High-tension connecting-insulator.



A.BITTER & E.VVEISSBERG.

HIGH TENSION GONNEGTING INSULATOR.

APPLICATION FILED SEPT.4,191&

Patented Apr. 8, 1.913.

Talinn..

INVERToRs ANDREAS ITTER h ERNST Walsssna WrrNEsEs ATTORNEY ANDREAS BITTER AND ERNST WESSBERG, OF CASSEL, GERMANY.

HIGH-TEN SION CONNECTING-INSULATOR.

Specification of Letters Patent.

' Patented Apr. 8, NH3'.

Application led September 4, 1912. Serial No. 718,578.

To all whom t may concern.'

lBe it known that We, ANDREAS Brr'rnn and ERNST VVErssnEno, both engineers and subjects of the German Emperor, residing at Cassel, Germany, have invented a nea7 and useful High-Tens`ion Connecting-Insulator; and We do hereby declare the following to be a full, clear, and exact description ofthe same.

This invention refers to a safety fuse for electric apparatus and of the type employing oil', such electric apparatus beingv for example distributing transformers and oil switches.

According to the present invention the cartridge With the fuse Wire is removably arranged in tlievconnecting orleading-in insulator or terminal of the apparatus, and its fuse chamber is connected at. its inner end `With the oil space of the apparatus.

The fuse chamber will thus be elast-icallysealed because the connecting insulator can be arranged in the open like the Delta pettic'oats and consequently the Whole arrange` ment can be usedforvery high tensions.

` The accompanying drawing shows one lform of construction.

`Figurel shows in sectional elevation a complete insulator Wit-h built-in safety fuse; Fig. 2 showts a longitudinal and a cross section of the removable cartridge.

l- The ,cartridge consists of a cylindrical tube Z1 made of. strong insulating material and coated with fireproof material c. The tube is provided at the top and bottom With metal stoppers or plugs d and e, in which the fuse Wire a is soldered. The lower stopper e is perforated. A metal rod s is screwed into the upper stopper d through which theV current is supplied and by means of which the cartridge can be introduced into or re, -moved from the insulator f. This insulator p is arranged in the lid h. of the case which contains oil and it carries at top and bot-' tom metal caps z' and c firmly cemented in place, to which can be connected the lead and returnl Wires for .the current. A screw thread or bayonet joint is provided' on the upper cap 27 so that the inner chamber of the insulator can be shut olf by means of thev hood Z from the atmospheric air, suitable packing material being employed. The chamb r in the insulator communicates through an opening in the lower cap Wit-h the oil chamber of the apparatus, the fuse Wire a being covered toabove 1/3rd of, its length with oil.

I In order to prevent metal particles .fall-k ing out into the case as Well as a too rapid expulsion of the oil from the fuse chamber the opening 0 can be covered over by means of a sieve or strainer.

The safety device `Works as follows Upon any short-circuiting taking place ther also immediately melted. The hot. metal,

vapors will at the same time come into con tact with the oil, are condensed, the pressure disappears and the pursuing oil will cover the endv of the fuse Wire so that on the next passage of the alternating current through the point of zero value the arc will beextinguished. A

The safety is considerably increased 0W- ing tothe fact. that the arc is completely in closed by solid insulat-ing'material 'and any bursting of the insulator appears impossible inasmuch as it is stil'ened at both ends as Well as in the middle by metal rings; the slight pressure arising can only occur in the cartridge Which is made of strong material.

In order,fin accordance .With the present invention, to protect the thin fuse Wire from being destroyed by ozone, a concentric metal sheet jacketing m is provided which is connected to the current supply at z'.

Having thus described our invention, what We claim as such and desire to secure by Letters Patent is y l. A safety fuse for electric apparat-us containing oil, comprising a connecting in` sulator, a cartridge With the fuse Wire arranged in said connecting insulator and a fuse chamber shut olf from the atmosphere and communicating at its inner end with the oil contained in said apparatus, so that a portion of the fuse Wire is covered with oil, the oil thus forming an elasticsealing of the fuse chamber.

l2. A safety .fuse for electric apparatus containing oil, comprising a connecting insulator, a cartridge Iwith the fuse Wire arranged in said' connecting insulator and afuse chamber shutl 0H from the atmosphere and communicating at its'inner end with the o'l mntulwd n smid apparatus, so ihui. :1 pm'ou of the imc wl'c 1S Cm'mQd with oil, theI oil thus 'forming an hlstv "uhng of tho fuse chumbm, und u concentric metal u vhn- 5 der connected to rho currfnt supply and zu'- lflnged in said insulator, for ploiocing Said fuse wir@ 'from being destroyed by ozono.

11 'testimony whereof, We have signed our muws in lhhI spcvculolx in the presume uf ivm enhscrlhmg wltncsscs.

ANDREAS RITTER. ERNST WEISSBER l W it 1105505.

R01; mw G UDDEN, Eux ST GRAF. 

